نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه مراغه، مراغه، ایران
2 گروه گیاهپزشکی دانشکده کشاورزی، دانشگاه مراغه، مراغه، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Greenhouse whitefly Trialeurodes vaporariorum is a polyphagous and economically important pest throughout the world. In this study effect of the feeding of predatory bug Macrolophus pygmaeus and spraying of a free amino acid (Delphan Plus®) on biological parameters of the greenhouse whitefly on two cultivars of bean (Azna and Guli cultivars) and cucumber (Kish and Super Star cultivars) as well as the effect of the treatments on parasitation rate by Encarsia formosa were evaluated. Mean comparisons showed that the highest and lowest percentages of whitefly establishment were related to the treatments with predator and Delphan Plus in (Kish: predator 10.93 and Delphan 1.59) respectively, while the highest reduction in establishment was obtained on the Azena bean variety (with Delphan: 0.75) and Super Star variety on the cucumber (with Delphan: 0.81). Also, Delfan Plus has significantly reduced the percentage of herbivore eggs survival on both cucumber and bean varieties compared to the corresponding control as well as reduced the number of nymphs per female in the treatments. In addition, the number of adults that appeared per female decreased in treatments with Delphin Plus in the cultivars of both plants compared to the control. Regarding the parasitization percentage, the interaction effects bilateral interactions of plant-predator, plant-Delphan plus and predator- Delphan plus were also observed. In general, the effect of all the mentioned bilateral intractins caused an increase in the percentage of parasitization of third and fourth instar nymphs by E. formosa in the treatments compared to the control.
کلیدواژهها [English]
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